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Note 1 - Summary of Significant Accounting Policies - Components of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Gross Carrying Amount	$ 22,517	$ 22,670
Accumulated Amortization	12,098	11,380
Net Carrying Amount	10,419	11,290
Customer Relationships [Member]
Gross Carrying Amount	22,491	22,491
Accumulated Amortization	12,095	11,259
Net Carrying Amount	$ 10,396	$ 11,232
Customer Relationships [Member] | Minimum [Member]
Remaining Amortization Periods (Month)	79 months	88 months
Customer Relationships [Member] | Maximum [Member]
Remaining Amortization Periods (Month)	179 months	188 months
Other Intangible Assets [Member]
Gross Carrying Amount	$ 26	$ 179
Accumulated Amortization	3	121
Net Carrying Amount	$ 23	$ 58
Remaining Amortization Periods (Month)	216 months
Other Intangible Assets [Member] | Minimum [Member]
Remaining Amortization Periods (Month)		8 months
Other Intangible Assets [Member] | Maximum [Member]
Remaining Amortization Periods (Month)		45 months

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 340
-Section 50
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+ References

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-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
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